The e-mail address registered with your WordPress.com account is your unique identifier. You will notice that when you sign up, we do not require any other information. As such, this is how we are able to verify ownership of blogs and accounts; it is very important to remember and update it as necessary.
If you send us a note requesting help with accessing your account/blog, we will require an e-mail from the address registered with the account. Otherwise, we cannot help.
Early on, WordPress.com allowed users to create several user accounts using the same email address. This created several problems with account management, so we had to make changes and require each user account to use a unique email address. Accounts may not share addresses.
The single sign-on method is perfect unless you require separate accounts for some reason. In that case, you’re welcome to keep separate accounts. Each account should have its own email address.
There is a trick that works with Gmail (and possibly other email providers) to let you use one email address as though it were several different addresses. Gmail lets you add “+something” to your mailbox name and still get your mail. For example, firstname.lastname@example.org and email@example.com and firstname.lastname@example.org each look like different addresses to our system but they all route mail to the same inbox: email@example.com.
Issues Changing your E-mail Address
If you attempt to change the e-mail address in your Personal Settings and find that it never sticks after saving the changes, the issue is quite simple. The e-mail address you are attempting to use is probably associated with another WordPress.com account. Because the e-mail address is the unique identifier of all users, each address can only be associated with one WordPress.com account. Thus, if you attempt to change it, it will not allow you to do so.
The remedy is just as simple. You must log in to the account currently holding your desired e-mail address and change it to something else. This will allow you to free up the e-mail address that you want to use. Once the address is free to use, log in to your primary account and change the e-mail address in your user profile (what you were originally trying to do). Do not be shocked if it takes a little while for the address to completely free itself up.
If you requested the change but did not receive the e-mail confirmation to finalize it (or the confirmation did not work), please contact support.
When you leave a comment on a blog at WordPress.com, and if you are logged in, your email address is made available to the owner of the blog when they see your comment. This is the same as you see when people comment on your blog.
If you are uncomfortable with that, you must log out of WordPress.com before leaving a comment. Even then you will have to leave an email address but it will be your choice as to what you enter. Some blogs will require you to be logged in to make a comment – in that case, you cannot.
If you leave a comment and realize you were logged in, please do not contact support – nothing can be done. We will not, under any circumstances, edit the comments on our users’ blogs at your request.
Custom E-mail with your Blog
WordPress.com bloggers can receive email services by using the free Google Apps for Domains service, or with any other email provider. If you have purchased the Domain Mapping Upgrade, please review the Add Email support document.